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    A Comparison Between Age Determinations of the Antarctic Fish Notothenia gibberifrons Lönnberg Using Scales and Otoliths

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    Document Number:
    WG-FSA-89/13
    Author(s):
    R. Coggan (United Kingdom), K. Skora (Poland), A. Murray and M. White (United Kingdom)
    Agenda Item(s)
    Abstract

    Scales and otoliths were collected from 304 specimens of the Antarctic fish Notothenia gibberifrons. When interpreted separately, only 25% of scale and otolith readings agreed. When a scale and otolith from a single simultaneously, 75% of readings agreed. of otolith readings changed between specimen were interpreted 60% of scale readings and 30% separate and simultaneous interpretations. Estimates of age tend to be lower when made from scales. Predictions of yield per recruit utilising age data derived from scales are approximately 30% greater than predictions utilising age data derived from otoliths.

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